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6 - Edge-𝑘star models

Published online by Cambridge University Press:  aN Invalid Date NaN

Charles Radin
Affiliation:
University of Texas at Austin
Lorenzo Sadun
Affiliation:
University of Texas at Austin
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Summary

In this short chapter, we show that the edge-kstar model exhibits many of the properties of the edge-2star model. In particular: all entropy maximizers are multipodal with a uniform bound on the number of defining parameters; there is a single bipodal phase along the lower boundary of the phase space; near the top of the phase space there is a phase transition between cliquelike and anticliquelike graphs, with two optimal graphons on the curve dividing these regions. We also show that there is a bipodal phase in a model where we constrain an arbitrary positive linear combination of kstar densities. As we will see in Chapter 7, every edge-H model (where H is a fixed graph) is well approximated by an edge-(linear combination of kstars) model. The estimates of this chapter are at the core of the proof of Theorem 7.11, proving the existence of a bipodal phase for all edge-H models.

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  • Edge-𝑘star models
  • Charles Radin, University of Texas at Austin, Lorenzo Sadun, University of Texas at Austin
  • Book: Emergence and Phase Transitions in Uniform Random Graphs
  • Chapter DOI: https://doi.org/10.1017/9781009862141.006
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  • Edge-𝑘star models
  • Charles Radin, University of Texas at Austin, Lorenzo Sadun, University of Texas at Austin
  • Book: Emergence and Phase Transitions in Uniform Random Graphs
  • Chapter DOI: https://doi.org/10.1017/9781009862141.006
Available formats
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Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Edge-𝑘star models
  • Charles Radin, University of Texas at Austin, Lorenzo Sadun, University of Texas at Austin
  • Book: Emergence and Phase Transitions in Uniform Random Graphs
  • Chapter DOI: https://doi.org/10.1017/9781009862141.006
Available formats
×